Sheet metal plank



Dec. 22, 1931.

F. RAUWALD SHEET METAL PLANK Filed Jan. 13, 1930 QMQM Patented Dec. 22, 1931 I UNITED STATES FERDINAND RAUWALD, F ESSEN, GERMANY SHEET METAL IPLAN'K Application filed January 13, 1930, Serial No. 420,557, and in Germany March 19, 1929.

In making excavations for buildings and the like, wooden planks are usually employed for supporting the sides. The replacement of such planks by sheet metal planks is feasible only provided the latter possess the requisite moment of resistance, on the one hand, and are very light on the other, since theywould otherwise be too expensive. In addition, they must be so constituted that the stiffening 8 members employed will not slip down.

According to the present invention, the sheet metal planks are of channel form, and are bent over sharply at the edges or flanges so that the bends serve to engage adjacent planks. Moreover, these planks are provided with projections (of any desired shape and disposed conveniently to suit the purpose in view) to accommodate the stiffening members in such a way'as entirely to prevent the i9 latter from slipping down.

The invention is illustrated on the accompanying drawings.

Fig. 1 is a side elevation of one arrangement showin the sheet metal planks or panels assembledi Fig. 2 a corresponding side view.

Fig. 3 a horizontal section on line III-III of Fig. 1.

Fig. 4 is a transverse sectional View ofa metal planking such as shown in Fig. 5 and taken on the line IVIV of that figure.

Fig. 5 a fragmentary perspective view of a constructional form of one plank.

Fig. 6 is a fragmentary perspective view of a modified form.

Fig. 7 a section (on the line VII-VII of Fig. 6).

Fig. 8 is a fragmentary perspective view of another modification, and

Fig. 9 a section (on the line IX-IX of Fig. 8).

The sheet metal planks A are pressed so as to form in their mainpart longitudinal grooves or channels (two channels in the constructional forms being illustrated) and are provided at the webs of these channels with pressed out projections 3 to prevent the stiffening members G from slipping off when the planks are in place.

As clearly shown in the drawings, each plank A is provided at one side with a sharply bent hook-like flange a, so as to form a narrow groove a At the other side, the plank is formed with a flange b. The planks are assembled in the manner illustrated by Figs. 3 and 4, so that the plane flange I) overlaps the hook-like end a of the next adjacent plank and enters the groove a of this plank.

In the construction according to Figs. 1 to 3 the projections 3 are of hemispherical formation; according to Figs. 4 and 5 they are of conical formation; in Figs. 6 and 7 they are oblong; and according to Figs. 8 and 9 they are of pyramidal formation.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. A wall shoring or planking comprising sheet-metal sections having intervaled longitudinal channel-grooving with flat substantially wider web-portions between and opposite margins bent over into flanges adapting them to edgewise overlapping fit with one another along the lines and in the form of such grooving; the web-portions thereof being formed with a plurality of rows of projections extending in rows transversely thereacross in spaced relation, the said projections in adj acent rows serving to therebetween accommodate or receive stiffening members for supporting the same without any looking or connection to said members.

2. Wall shoring-material according to the preceding claim, wherein the projections on the web-portions of the sections are formed by indentations from one side and are unperforated, the same forming button-like bulges which hold the sections against slide movement by bearing against the edges of stiifening members applied at either or both sides.

3. A wall shoring comprising a plurality of sheet-metal sections having regularly spaced longitudinal grooving of triangular shape with flat substantially wider web-portions between and marginal edges formed to fit overlappingly along lines and in joint formation of such grooving, together with brace members extending transversely there-, of for stllfening and supporting the same signature. v v

FERDINAND RAUWALD. 

